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AssigneeTohoku University
InventorsKazushi Yamanaka, Yoshikazu Ohara, Yohei Shintaku
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Scattered waves from the defect of burst ultrasonic waves radiated from an ultrasonic transmitter to a structure in two different arrangements of the ultrasonic transmitter and an array receiver are received by the array receiver so as to obtain a reception signal. The reception signal is subjected to a band-pass filter that passes a specific frequency component, shifted by different time according to the position of each reception sensor element of the array receiver and then, added so as to obtain a processing signal. On the basis of the processing signal, an image of the defect is obtained, respectively. A common portion of the obtained two images is extracted.
An imaging method of a structure defect that detects a defect such as a crack contained in a structure, having an ultrasonic transmitter that radiates burst ultrasonic waves composed of sine waves with a predetermined cycle number and an array receiver having a plurality of reception sensor elements, comprising:
An imaging method of a structure defect that detects a defect such as a crack contained in a structure, having an ultrasonic transmitter that radiates burst ultrasonic waves composed of sine waves with an arbitrary cycle number and an array receiver having a plurality of reception sensor elements, comprising:
An imaging device of a structure defect that detects a defect such as a crack contained in a structure, comprising:
An imaging method of a bubble or a lesion that detects a bubble or a lesion contained in a tissue, having an ultrasonic transmitter that radiates burst ultrasonic waves composed of sine waves with an arbitrary cycle number and an array receiver having a plurality of reception sensor elements, comprising:
An imaging device of a bubble or a lesion that detects a bubble or a lesion contained in a tissue, comprising:
Dependencies are inferred from the claim text.